Ground Plane Slot Structures for Isolation of Cosited Microstrip Antennas

Kerby, Kiersten C.

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https://hdl.handle.net/2142/11973 Copy

Description

Title

Ground Plane Slot Structures for Isolation of Cosited Microstrip Antennas

Author(s)

Kerby, Kiersten C.

Issue Date

2009-06-01T16:05:01Z

Director of Research (if dissertation) or Advisor (if thesis)

Bernhard, Jennifer T.

Doctoral Committee Chair(s)

Bernhard, Jennifer T.

Committee Member(s)

• Cangellaris, Andreas C.
• Carney, Paul S.
• Franke, Steven J.

Department of Study

Electrical and Computer Engineering

Discipline

Electrical and Computer Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• microstrip antennas
• Isolation
• slots
• transmission line model
• mustache

Abstract

Ground plane slot structures have been shown to reduce coupling between cosited antennas. Although some such structures have already been reported, no analytical model exists to describe their behavior and there are no design guidelines. In this work, the behavior of reported ground plane structures is used as a clue to obtain generalizable information about such structures' behavior. The structures' scalability and excitation behavior is investigated. Next a circuit model is derived that describes the interaction of microstrip patch antennas with a ground plane slot structure based on mutual admittances between the ground plane slots and the effective slots at the antennas' radiating edges. The circuit model leads to design guidelines for the ground plane slot structure and an approximate relationship between mutual admittances which must be satisfied in order to isolate the antennas. Finally, we present a novel ground plane slot structure that mitigates some of the disadvantages of earlier designs.

Graduation Semester

2009-5

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http://hdl.handle.net/2142/11973

Copyright and License Information

Copyright 2009 Kiersten C. Kerby

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